Problem when accelerating over 4000RPM

stefman · 03-20-2011, 10:04 AM

Someone suggested I post here too.

So today I was merging onto the highway and accelerated a bit when the car suddenly had a loss of power and felt like one of the cylinders wasn't working. There were no error codes or messages about reduced power, the computer seemed to think all was fine.

Stopped on the side, turned off and on the engine and all was fine again until the next time I hit 4000RPM.

I'm driving an E92 335i N54 engine. Could it be the dreaded fuel pump or could it be that I only need a new fuel/air filter? (never changed those yet). Car just went off warranty so if it's the fuel pump that would really suck.

Anyone have any insight?

enrita · 03-20-2011, 10:21 AM

No codes = No issues in my book. did you punch it ? maybe traction control intervened? You would have got a missfire code if a cylinder wasnt firing.
Try to replicate. If the HPFP is going you would get a LIMP code and codes.

X2Board · 03-20-2011, 10:34 AM

Quote:

Originally Posted by stefman

Car just went off warranty so if it's the fuel pump that would really suck.

No worries there. The HPFP is warrantied for 100K.

Bimmer This · 03-20-2011, 11:11 AM

Call the dealer to see if your car has the recall on it. Recalls are covered no matter how many miles your have on the car.

stefman · 03-21-2011, 02:33 AM

Thanks all, today I got the dreaded message about reduced power. Seems it's the hpfp. My problem is that I live in Singapore and I'm not sure if BMW issued the recall here too. I'm crossing fingers!

03-20-2011, 10:04 AM	#1
stefman .::fel8me::. 7 Rep 453 Posts Drives: 335i Black Sapphire Coral Red Join Date: Apr 2007 Location: Singapore iTrader: (0)	Problem when accelerating over 4000RPM Someone suggested I post here too. So today I was merging onto the highway and accelerated a bit when the car suddenly had a loss of power and felt like one of the cylinders wasn't working. There were no error codes or messages about reduced power, the computer seemed to think all was fine. Stopped on the side, turned off and on the engine and all was fine again until the next time I hit 4000RPM. I'm driving an E92 335i N54 engine. Could it be the dreaded fuel pump or could it be that I only need a new fuel/air filter? (never changed those yet). Car just went off warranty so if it's the fuel pump that would really suck. Anyone have any insight? __________________ E92 335i ordered April 28, 2007.....delivered 24 January 2008 Worth the wait
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03-20-2011, 10:21 AM	#2
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	No codes = No issues in my book. did you punch it ? maybe traction control intervened? You would have got a missfire code if a cylinder wasnt firing. Try to replicate. If the HPFP is going you would get a LIMP code and codes. __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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03-20-2011, 11:11 AM	#4
Bimmer This Major General 99 Rep 6,473 Posts Drives: 2007 BMW 335i Join Date: Nov 2008 Location: Westminster iTrader: (3)	Call the dealer to see if your car has the recall on it. Recalls are covered no matter how many miles your have on the car.
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03-21-2011, 02:33 AM	#5
stefman .::fel8me::. 7 Rep 453 Posts Drives: 335i Black Sapphire Coral Red Join Date: Apr 2007 Location: Singapore iTrader: (0)	Thanks all, today I got the dreaded message about reduced power. Seems it's the hpfp. My problem is that I live in Singapore and I'm not sure if BMW issued the recall here too. I'm crossing fingers! __________________ E92 335i ordered April 28, 2007.....delivered 24 January 2008 Worth the wait
	Appreciate 0 Quote